A116988 Sum of digits of (10^n)!.

1, 27, 648, 10539, 149346, 1938780, 23903442, 284222502, 3292100235, 37420852599

Offset

0,2

Comments

Cf. A004152 Sum of digits of factorial numbers, A113364 1,27,648,16245,... with first three terms coinciding with this SEQ.

Links

Table of n, a(n) for n=0..9.

Example

a(1)=27 because 10!=3628800 and 3+6+2+8+8+0+0=27.

Mathematica

Do[Print[Total[IntegerDigits[(10^n)! ]]], {n, 0, 7}]

Prog

(Python)
from math import factorial
def A116988(n):
    return sum(int(d) for d in str(factorial(10**n))) # Chai Wah Wu, May 21 2018

Crossrefs

Cf. A004152, A113364.

Sequence in context: A046359 A223500 A060603 * A113364 A095898 A014914

Adjacent sequences: A116985 A116986 A116987 * A116989 A116990 A116991

Keyword

hard,more,nonn,base

Author

Zak Seidov, Apr 02 2006

Extensions

One more term from Ryan Propper, Jun 27 2007

a(9) from Chai Wah Wu, May 21 2018

Status

approved